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IAU: Central Bureau for Astronomical Telegrams

      The CBAT is responsible for the dissemination of information on transient astronomical events and various IAU news including the announcement of designations and names of various celestial objects -- via the IAU Circulars (IAUCs), a series of printed-postcard-sized announcements issued at irregular intervals as necessary in both printed and electronic form, and (as of 2002 Dec. 20) also via the electronic-only Central Bureau Electronic Telegrams (CBETs). The CBAT is the official worldwide clearinghouse for new discoveries of comets, solar-system satellites, novae, supernovae, and other transient astronomical events. During 1965-2010, the CBAT operated at the Harvard-Smithsonian Center for Astrophysics (specifically under the SAO umbrella). During 2010, the CBAT and its Director have moved to the Department of Earth and Planetary Sciences at Harvard University, and the computer infrastructure is gradually being moved from SAO to EPS.

Services of the CBAT

• Astronomical headlines from recent CBAT publications.

• CBAT publications and services.
  • Subscription information.
  • On-line IAUCs. [the hundred-or-so most recent IAUCs are available only to subscribers, while many issues before IAUC 2700 (1974 Sept. 20) are unavailable in any form yet (though most of these should be available by late 2009).]
    • Scans of older IAUCs
      • all IAUCs from the years 1920-1930 are available here
      • scans of (or links to) all Harvard Observatory circulars/bulletins from the years 1895-1920
    • Index of item titles on IAUCs 1-8000 [warning: large file!].
  • On-line CBETs. [CBETs 1-1199 freely available; CBETs 1200+ available to subscribers only.]
  • Topical indices to recent IAUCs and CBETs:
    • Comets
    • Novae and Unusual Variables
    • New Planetary Satellites
    • Supernovae
  • ADS search for items on IAUCs and CBETs
  • Web access to the computer services.

• Search the CBAT site.

Information for CBAT contributors

• How to report a discovery
  • What types of discoveries should be reported to the CBAT for possible publication?
  • Discovery report form.
  • Check your (super)nova suspects for known minor planets.
  • How to submit CCD images in support of a discovery.
  • Reporting faint, spectroscopically-unconfirmed supernova candidates.
  • Unconfirmed objects reported to the CBAT that are in need of confirming observations.
• How to submit a scientific report for possible publication
  • Scientific report form.
• How to submit photoelectric photometry or visual magnitude estimates of variable stars and comets for possible publication.

History of the CBAT

Other Helpful Information

• Astronomical headlines from recent circulars.
• Index to the CBAT/MPC/ICQ pages.
• The Edgar Wilson Award, an award for amateur comet discoverers.
• Ephemerides and orbital elements for comets, NEOs, distant objects and bright minor planets.
• Various lists and plots.
• Press Information Sheets
• List of new features on these pages.
• Links to other IAU-related sites are now accessible from the International Astronomical Union's website.
• Notices concerning power outages and downtimes for the CBAT/MPC computers (meaning web and e-mail-access downtime).
• ALERT! We have introduced additional screening software to block spam e-mail, due to its prolific increase; it is strongly recommended that those sending e-mail to the CBAT (or ICQ or MPC) remove ALL html-encoded text, as we cannot read such text easily (we do not use web browsers for reading e-mail) and such text may be deleted by our anti-spam software. (This means: send plain ASCII text *only*, *not* plain ASCII text plus html-encoded text in same message. The vast majority of CBAT contributors have no problem sending ASCII-only e-mail with contributed observations, so HTML-encoding is a natural place to attack SPAM e-mail since the vast majority of SPAM has html-encoding.)

• Credits (and awards) and a user-feedback form.

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